Abstract

RFC 5681 documents the following four intertwined TCP
congestion control algorithms: slow start, congestion avoidance, fast
retransmit, and fast recovery. RFC 5681 explicitly allows
certain modifications of these algorithms, including modifications
that use the TCP Selective Acknowledgment (SACK) option (RFC 2883),
and modifications that respond to "partial acknowledgments" (ACKs
that cover new data, but not all the data outstanding when loss was
detected) in the absence of SACK. This document describes a specific
algorithm for responding to partial acknowledgments, referred to as
"NewReno". This response to partial acknowledgments was first proposed
by Janey Hoe. This document obsoletes RFC 3782. [STANDARDS-TRACK]